6553894491 has 16 divisors (see below), whose sum is σ = 9714316800. Its totient is φ = 4367083464.

The previous prime is 6553894433. The next prime is 6553894537. The reversal of 6553894491 is 1944983556.

6553894491 is a `hidden beast` number, since 6 + 553 + 89 + 4 + 4 + 9 + 1 = 666.

It is not a de Polignac number, because 6553894491 - 2⁷ = 6553894363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6553894891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4471 + ... + 114576.

It is an arithmetic number, because the mean of its divisors is an integer number (607144800).

Almost surely, 2^6553894491 is an apocalyptic number.

6553894491 is a deficient number, since it is larger than the sum of its proper divisors (3160422309).

6553894491 is a wasteful number, since it uses less digits than its factorization.

6553894491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121095 (or 121089 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 6553894491 is about 80956.1269515779. The cubic root of 6553894491 is about 1871.3993825347.

The spelling of 6553894491 in words is "six billion, five hundred fifty-three million, eight hundred ninety-four thousand, four hundred ninety-one".